CHRISTOPHERSON, Robert W. <br/><br/>
Geosysetems 

 - 3rd ed. 
 - New Jersey.  Prentice-Hall inc.  1997 
 - xx, 700pg 
<br/><br/><label>ISBN: </label>0-13-505314-5 
<br/><br/><label>Dewey Class. No.: </label>910.02